Propeller screw



May, 20 1924. 1,495,002

J. N. DELGADO PROPELLER SCREW Filed March 22. 1923 zsneets-snget 1ATTORNEY WITNESS:

Patented May 20, 1%24.

UMTED stares JOSE NEFTALI DELGADO, 0F READING, PENNSYLVANIA.

PROPELLER $CR-EW.

Application filed March 22, 1923. Serial No. 626,962.

To all whom it may concern:

Be it known that I, [lose NEFTALI DEL- GADO, a citizen of Mexico,residing at Heading, in the county of Berks and State of Pennsylvania,have invented new and useful Improvements in Propeller Screws, of whichthe following is a specification.

This invention relates to propelling means for boats of different kinds,the general ob ject of the invention being to provide means forpropelling the boat by turning a crank which operates the propeller sothat it is not necessary to use oars.

Another'object of the invention is to so arrange the propeller partsthat the blades will be feathered when they are moving in the directionthe boat is moving so as to offer the least resistance to the'water.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims. 3;

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure lis a plan View showing the invention in use upon a row-boat.

Figure 2 is a sectional view taken transversely through Figure 1.

Figure 3 is an enlarged View of the device itself.

Figure 4 is a section on line 4-4 of Figure 3.

Figure 5 is a section on line 55 of Figure 3.

Figure 6 is a detail view showing the cammed head and the shank ,of oneof the propeller blades in section and the relation of the shank withcammed surface.

In these views 1 indicates a bracket which is provided with the longvertical bearing 2 and the short horizontal bearing 3, the bearing 2carrying the vertical propeller shaft 4 and the bearing 3 carrying theshaft 5 which is provided with a handle 6. These shafts are gearedtogether by the gears 7. The lower end of the propeller shaft 4 hasconnected therewith an enlarged head 8 which has a transverse hole 9passing therethrough which rotatably reecivesthe shaft 10. The propellerblades 11 have their shanks 12 securely mounted on the ends of thisshaft at right angles to each other and these shanks are of oval shapein cross section, as shown. The lower end of the bearing 2 has anenlargement 2 thereon which carries a cam 2, which, when engaged by theoval shank 12 of the blade, will turn the same and the blade and thusfeather the blade and permit it to pass through the water with the leastresistance. These parts are so arranged that when the blade is travelingoutwardly and rearwardly it will offer the maximum resistance to thewater and thus act to propel the boat but when it is traveling forwardlyit will be feathered and thus not interfere with the passage of the boatthrough the water. It will be seen that power is imparted to thepropeller blade by turning the shaft 5 by means of the handle 6 whichwill rotate the shaft 4 through means of the gear 7. As many of these devices can be used as necessary and they are detachably connected withthe boat by means of the plates 13 which are fastened to the boat andwhich have undercut beads 14 thereon engaging grooves 15 or like shapein the bracket 2. In this way the devices can be pulled upwardly anddetached from the boat and placed inside the boat when not in use.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claims.

WV hat Iclaim is 1. In combination with a boat, a plate thereon havingan undercut bead, a bracket having a groove designed for fittingengagement with the bead, a pair of shafts carried by the bracket, gearsconnecting the shafts together, a handle connected with one shaft, atransversely disposed shaft connected with the other shaft, propellerblades rigidly connected with the transversely disposed shaft and a camcarried by the bracket and engaging portions of the propeller blades forfeathering them during a part of the revolution.

2. The combination with a boat, of a plate secured thereto and beingprovided with a bead having undercut side walls, a bracket,

the bead and being provided with horizontal and vertically disposedbearings, a shaft mounted for rotation in each of these bearings,manually operated means for simultaneously rotating the shafts, anapertur'ed enlarged head formed on the lower end of the verticallydisposed shaft, a cammed surface formed on the enlarged lowe'1"'en'd-"0fthe 7 wall of vertically disposed bearings, a transversely disposedshaft mounted forrotation 10 in theaperture of the head; p-rope-lliblades carried by the transversely disposed shaft, and oval shapedshanks forming the inner endsofth'e blades and adapted for rotaryengagement with the camnied surface as and 15

